- Two carb progressive linkage for 4-cyl Ford flathead engines
- 5 inches and 5-3/16 inches from carb to carb
- Extended throttle shafts not required
- Fits 4-cylinder Equalizer and Riley Two Port 2x2 intakes (5in)
- Fits most 2x2 adapters designed for 4bbl carb intakes (5-3/16in)
- Fits Vern Tardell Slingshot 2x2 adapter (5-3/16in)
- Do NOT use with banjo fittings
A high quality 2x2 progressive carburetor linkage designed for great looks and a positive action (click more
for applications and details). This linkage is sized for use with
intake manifolds and manifold adapters that space the carburetors 5 to
5-3/16in apart, including most '2x2 into 4-bbl' adapters, and the Vern
Tardell Slingshot 2x2.
It can also be used for early Ford
4-banger (Model A/B engines) 2x2 intakes, which place the carburetors 5
inches part. See above for typical manifold applications.
specialist Charlie Yapp tells us, "Ford Model A and B type engines are
mounted in the frame at 4 degrees tilt to the rear so the manifolds have
a 4 degree angled mount to keep the carburetors level. The "Equalizer"
and "Riley Two Port" dual intake manifolds feature a mixing plenum so
the customer can set it up with two functioning carbs linked directly or
with a progressive linkage. It will also work quite well, on the
street, with one dummy carb at the rear and the functioning carb
forward. Why? The reason goes back to the 4 degree tilt. If any raw fuel
finds its way into the manifold it will run backwards, giving the
liquid fuel more time to be evaporated before it goes into the rear
Siamese ports. Of course . . . the raw fuel would degrade the
performance and cause a rich situation. If the carbs are set up and
jetted correctly there would be no liquid fuel."
manufactured exclusively by Stromberg Carburetor, the TwoStep linkage
range combines clean, traditional looks with maximum leverage and huge
versatility. Each kit comes pre-assembled and installs in just two
simple steps, without the need for extended throttle shafts. Our kits
are not a ‘one size fits all’ solution. Different intakes use different
carb spacing, so we modelled every kit in 3D CAD and offer different
kits for specific intakes. If you’re in doubt, simply measure your
manifold spacing – throttle shaft to throttle shaft.
Check out the following features:Die-cast zinc SuperLink lever arms. All other parts stainless steel. Every
kit comes with new Stromberg ‘Snapback’ throttle return springs, which
wrap around the end of the throttle shaft. These chemically blacked,
stainless steel torsion springs snap the carburetors shut, yet virtually
disappear from view. TwoStep progressive systems are
designed to ensure optimum performance and maximum versatility. The long
primary lever has three mounting points so you can change when the
secondary carburetor opens, and you can pull the front carburetor or
push the rear one open to suit individual applications. On the top
setting (as supplied), the linkage will start to open the secondary
carburetor at around 50% throttle. Lower holes will open the secondary
carburetor sooner. To improve leverage, the primary
(center) arm was kept as long as possible without hitting the carburetor
S-jet. It also has a bigger clamping screw to handle more linkage
torque. The sliding progressive rod meets the secondary carb rod at the
top of the lever arm - not part way down like some systems. Effective
leverage is especially important as 97 multi-carb systems have strong
spring resistance. The neat tapered rod stops are fully adjustable, with discreet set screw fixings. WARNING!
To use this linkage with banjo fuel fittings (eg. Stromberg 9082K and
9083K), you must add our 9086K banjo fitting spacers. Without them, the
banjo and its fuel hose will interfere with the long primary lever arm
causing linkage binding or sticking, which could result in uncontrolled
engine speed, property damage, serious personal injury or death. Always
read the instructions before installation.
TwoStep linkage kit comes with full instructions. Further help with
selection, installation and tuning is available at our Tech Center.